I was wondering where exactly can i learn more about this.  Its pretty difficult to find reference of how its done in real life.  There is plenty of reference for sprites and stuff, but nothing in the real.  So what are the exact mechanics for image streaks?  Is it the point of which eyes can no longer track it?  When would you draw an image streak from a duplicate sprite that you already drew, and when would you draw a new sprite pose with an image streak over it?

I'll post some fire emblem examples of what I mean.  I'm hoping this thread is a success cause I would love to learn how this is done.  And if there is anyone who is a master of this technique please reply